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<td ><a href="../qtdoc/index.html">Qt 5.12</a></td><td ><a href="qtquick-index.html">Qt Quick 模块</a></td><td ><a href="qtquick-module.html">C++ 类</a></td><td >QSGClipNode</td></tr></table><table class="buildversion"><tr>
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<li class="level1"><a href="#public-functions">公用函数</a></li>
<li class="level1"><a href="#details">详细信息</a></li>
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<h1 class="title">QSGClipNode 类</h1>
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<p>The <a href="qsgclipnode.html">QSGClipNode</a> class implements the clipping functionality in the scene graph. <a href="#details">更多...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign">头文件：</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QSGClipNode&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += quick</td></tr><tr><td class="memItemLeft rightAlign topAlign">继承自：</td><td class="memItemRight bottomAlign"> <a href="qsgbasicgeometrynode.html">QSGBasicGeometryNode</a></td></tr></table></div><ul>
<li><a href="qsgclipnode-members.html">所有成员的列表，包括继承成员</a></li>
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<h2 id="public-functions">公用函数</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qsgclipnode.html#QSGClipNode">QSGClipNode</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qsgclipnode.html#dtor.QSGClipNode">~QSGClipNode</a></b>() override</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QRectF </td><td class="memItemRight bottomAlign"><b><a href="qsgclipnode.html#clipRect">clipRect</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qsgclipnode.html#isRectangular">isRectangular</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgclipnode.html#setClipRect">setClipRect</a></b>(const QRectF &amp;<i>rect</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsgclipnode.html#setIsRectangular">setIsRectangular</a></b>(bool <i>rectHint</i>)</td></tr>
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<li class="fn">3 个公用函数继承自<a href="qsgbasicgeometrynode.html#public-functions">QSGBasicGeometryNode</a></li>
<li class="fn">20 个公用函数继承自<a href="qsgnode.html#public-functions">QSGNode</a></li>
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<h2 id="details">详细信息</h2>
<p>The <a href="qsgclipnode.html">QSGClipNode</a> class implements the clipping functionality in the scene graph.</p>
<p>Clipping applies to the node's subtree and can be nested. Multiple clip nodes will be accumulated by intersecting all their geometries. The accumulation happens as part of the rendering.</p>
<p>Clip nodes must have a geometry before they can be added to the scene graph.</p>
<p>Clipping is usually implemented by using the stencil buffer.</p>
<p><b>Note: </b>All classes with QSG prefix should be used solely on the scene graph's rendering thread. See <a href="qtquick-visualcanvas-scenegraph.html#scene-graph-and-rendering">Scene Graph and Rendering</a> for more information.</p></div>
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<h2>成员函数文档</h2>
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<h3 class="fn" id="QSGClipNode"><a name="QSGClipNode"></a>QSGClipNode::<span class="name">QSGClipNode</span>()</h3>
<p>Creates a new <a href="qsgclipnode.html">QSGClipNode</a> without a geometry.</p>
<p>The clip node must have a geometry before it can be added to the scene graph.</p>
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<h3 class="fn" id="dtor.QSGClipNode"><a name="dtor.QSGClipNode"></a><code>[override virtual] </code>QSGClipNode::<span class="name">~QSGClipNode</span>()</h3>
<p>Deletes this <a href="qsgclipnode.html">QSGClipNode</a>.</p>
<p>If the flag <a href="qsgnode.html#Flag-enum">QSGNode::OwnsGeometry</a> is set, the geometry will also be deleted.</p>
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<h3 class="fn" id="clipRect"><a name="clipRect"></a><span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> QSGClipNode::<span class="name">clipRect</span>() const</h3>
<p>Returns the clip rect of this node.</p>
<p><b>请参考 </b><a href="qsgclipnode.html#setClipRect">setClipRect</a>()。</p>
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<h3 class="fn" id="isRectangular"><a name="isRectangular"></a><span class="type">bool</span> QSGClipNode::<span class="name">isRectangular</span>() const</h3>
<p>Returns if this clip node has a rectangular clip.</p>
<p><b>请参考 </b><a href="qsgclipnode.html#setIsRectangular">setIsRectangular</a>()。</p>
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<h3 class="fn" id="setClipRect"><a name="setClipRect"></a><span class="type">void</span> QSGClipNode::<span class="name">setClipRect</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>rect</i>)</h3>
<p>Sets the clip rect of this clip node to <i>rect</i>.</p>
<p>When a rectangular clip is set in combination with <a href="qsgclipnode.html#setIsRectangular">setIsRectangular</a> the renderer may in some cases use a more optimal clip method.</p>
<p><b>请参考 </b><a href="qsgclipnode.html#clipRect">clipRect</a>()。</p>
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<h3 class="fn" id="setIsRectangular"><a name="setIsRectangular"></a><span class="type">void</span> QSGClipNode::<span class="name">setIsRectangular</span>(<span class="type">bool</span> <i>rectHint</i>)</h3>
<p>Sets whether this clip node has a rectangular clip to <i>rectHint</i>.</p>
<p>This is an optimization hint which means that the renderer can use scissoring instead of stencil, which is significantly faster.</p>
<p>When this hint is set and it is applicable, the clip region will be generated from <a href="qsgclipnode.html#clipRect">clipRect</a>() rather than <a href="qsgbasicgeometrynode.html#geometry">geometry</a>().</p>
<p>By default this property is <code>false</code>.</p>
<p><b>请参考 </b><a href="qsgclipnode.html#isRectangular">isRectangular</a>()。</p>
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